# Data Dictionary

The data dictionary describes every field the Federal Register Watcher shows or provides, grouped by
the kind of record it belongs to. Choose a record type from the menu.

The field names and descriptions are the same ones used by the
[Federal Register Watcher API](https://developers.federalregisterwatcher.ai/api), so this dictionary
is always in step with the data.

## Sources

Where a page has a **Source** column, it shows where each field's data comes from:

| Source | Meaning |
| --- | --- |
| Federal Register | Published by the [Federal Register](/background/federal-register). |
| Regulations.gov | Retrieved from [Regulations.gov](https://www.regulations.gov/), where the public can comment on rules. |
| NLI enriched | Generated by Numantic Legal Intelligence, for example AI keywords, summaries, sections and citations. |